Flanders in England

My grandfather was John Flanders (born 1905?) and he married Mary (born 1911?).They adopted my father David John Flanders in 1956 (he was born 24th January 1956).My name is Amy Flanders (born 05/02/1981) and I live in Hertfordshire, England and in Twickenham, Surrey.My sister Hayley (born 09/12/1983) and brother James (23/08/1986) are all interested in finding out about relatives or the name in general.We know we have relatives in Australia but as most of the Flanders apart from us (my family of five) are dead it would be great to hear any info about anything and anyone.Much obliged.